diff options
Diffstat (limited to 'event/feed.go')
| -rw-r--r-- | event/feed.go | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/event/feed.go b/event/feed.go index 78fa3d98d..f578f00c1 100644 --- a/event/feed.go +++ b/event/feed.go @@ -148,7 +148,9 @@ func (f *Feed) Send(value interface{}) (nsent int) { f.sendCases[i].Send = rvalue } - // Send until all channels except removeSub have been chosen. + // Send until all channels except removeSub have been chosen. 'cases' tracks a prefix + // of sendCases. When a send succeeds, the corresponding case moves to the end of + // 'cases' and it shrinks by one element. cases := f.sendCases for { // Fast path: try sending without blocking before adding to the select set. @@ -170,6 +172,7 @@ func (f *Feed) Send(value interface{}) (nsent int) { index := f.sendCases.find(recv.Interface()) f.sendCases = f.sendCases.delete(index) if index >= 0 && index < len(cases) { + // Shrink 'cases' too because the removed case was still active. cases = f.sendCases[:len(cases)-1] } } else { |